Poured Cementitious. Floor Systems. Ideal cementitious floor solutions for new construction and renovation

Transcription

1 Ideal cementitious floor solutions for new construction and renovation Poured Cementitious Floor Systems Please note because we routinely develop new systems, this document may not contain the latest updates. For product information, architectural specifications, and fire-rated or sound assembly performance information, contact your local USG Architectural Services Manager or visit usgdesignstudio.com. West: Jennifer Link-Raschko at South Central/South East: Alex MacDonald at North Central/North East: Brynn Shaeffer at For installation questions or to locate the nearest Levelrock applicator, contact Alcorp Marketing, Inc. at

2 United States Gypsum Company s floor underlayment systems are the choice for more residential and commercial construction projects because they offer a full product line of gypsum, portland, and engineered cements to meet all types of job conditions. These products and systems are designed to meet the new IBC code and the first to ensure that all sound systems are easily specifiable by a UL Design number without negating the fire rating. Versatile Poured Floors

3 User s Guide This brochure explains: The benefits of lightweight cementitious floor underlayments The different types of floor underlayments How to select and specify the appropriate components for floor underlayment systems Pages Understand Your System Overview 4 Applications Components Performance Testing Select Your System Performance Selector 14 Flooring Details Design Details Design Your System 30 Good Design Practices Specify Your System 32 Application Guide Specifications For More Information Technical Service 800 USG.4YOU Web Site 3 USG Poured Cementitious Floor Systems

4 Overview The LEVELROCK brand family of floor underlayments offers an extensive line featuring gypsum and engineered cements and acoustic components each designed to meet the specific requirements for a wide range of commercial, residential, renovation and institutional applications. Performance Our gypsum cement underlayments are available in compressive strengths ranging from psi, and require no shot blasting, a method of preparing existing concrete floors by using round iron shots as the abrasive. This line includes the first green underlayments in the industry made from recaptured gypsum, a byproduct of flue gas desulfurization (FGD), a process used by coal-fired electrical power plants to limit emissions of sulphur dioxide. Our engineered cement underlayment offerings include an industry standard Portland-based cement underlayment, as well as state-of-the-art high-alumina cement underlayments, all of which can be decorated with an approved coating or stain. Testing Products and systems undergo third-party testing to ensure that they meet exacting standards for fire resistance, sound and durability. Because elements used to improve sound performance may adversely affect the fire rating, floor underlayment systems are specifically designed to address both fire and sound ratings. Quality To further maintain quality control from design to manufacturing to installation, all LEVELROCK floor underlayments are expertly installed by authorized applicators who receive and maintain certification following comprehensive onsite and field training from United States Gypsum Company. Our single-source responsibility for your entire system, including primer, sealer, surface enhancer and LEVELROCK floor under-layment, assures a quality system that meets your needs. 4 USG Poured Cementitious Floor Systems

5 Typical Fire-Rated Floor Underlayment Assembly carpet and pad 1 LEVELROCK floor underlayment wood subfloor open web wood truss resilient channel 5/8 SHEETROCK FIRECODE C Core Typical Sound Install Floor Underlayment Assembly sheet vinyl 1 LEVELROCK floor underlayment 1/4 SRM-25 sound mat batts/blankets held w/ insulation supports wood subfloor open web wood truss resilient channels 16 o.c. 5/8 SHEETROCK FIRECODE C Core 5 USG Poured Cementitious Floor Systems

6 Applications Lightweight LEVELROCK floor underlayments provide a virtually selfleveling monolithic surface for use in residential, commercial, institutional and renovation projects. Our low water demand underlayments can be poured up to 30,000 square feet per day while setting to a smooth, flat surface in just 2 to 3 hours, allowing light trade traffic to resume within 24 hours. LEVELROCK floor underlayment accepts all types of floor coverings, including vinyl, composition tile, ceramic tile, natural stone, wood laminate, hardwood and carpet. To enhance sound performance and meet the International Building Code (IBC) requirement of 50 STC and 50 IIC, a sound reduction mat or sound reduction board can be applied before pouring LEVELROCK floor underlayment. Gypsum Cement Gypsum cement underlayments can be used in fire-rated, sound-rated and radiant heat applications; over wood, concrete and concrete plank without shot blasting; as well as in an innovative corrugated steel deck application. Our POURABLE BEFORE DRYWALL feature allows LEVELROCK floor underlayment to be applied prior to installation of drywall walls, substantially speeding up the construction process and minimizing the potential for mold and mildew. Engineered Cement Self-drying, wear-resistant engineered cement underlayments, which include Portland-based and high-alumina cements, are ideal for concrete, concrete planks and wood with metal lath applications. In addition, all of our engineered cements and PROFLOW underlayment can be decorated with an approved coating or stain. 6 USG Poured Cementitious Floor Systems

7 Components LEVELROCK floor underlayment systems have been comprehensively tested for fire and sound ratings. Components used in the system have been classified by Underwriters Laboratories (UL); substitutions are not recommended or supported by United States Gypsum Company. All LEVELROCK floor underlayment products are available presanded; PROFLOW floor underlayment and engineered cements are only available presanded. Refer to the appropriate product material safety data sheet for complete health and safety information. Residential/ Light Commercial Products LEVELROCK 2500 Floor Underlayment Recommended for residential construction (single and multi-family) Compressive strength of psi Minimum 3/4 thickness over wood, 1/2 over concrete Refer to product submittal sheet IG1450 for more information LEVELROCK 2500 Green Floor Underlayment Industry s first poured underlayment made with recaptured gypsum Compressive strength of psi May be eligible for USGBC LEED Credits (MR 4.1 & 4.2) LEVELROCK 3500 Floor Underlayment Ideal for both residential and light commercial applications Compressive strength of psi Minimum 3/4 thickness over wood, 3/8 over concrete Can be used as an upgrade in hard-surface areas in residential projects or as a topping to correct uneven floors in light commercial applications Meets resilient commercial floor covering industry standards Refer to product submittal sheet IG1448 for more information LEVELROCK 3500 Green Floor Underlayment Industry's first poured underlayment made with recaptured gypsum Compressive strength of psi May be eligible for USGBC LEED Credits (MR 4.1 & 4.2) Meets resilient commercial floor covering industry standards 7 USG Poured Cementitious Floor Systems

8 Components LEVELROCK RH Floor Underlayment Specifically designed for use with radiant heat systems Compressive strength of psi Minimum 3/4 thickness over the top of radiant tubes or cables Provides an efficient thermal mass to maximize the effectiveness of the radiant heat system Suitable for use in radiant heat systems designed to meet the requirements of the Radiant Panel Association Refer to product submittal sheet IG1459 for more information LEVELROCK RH Green Floor Underlayment Industry's first poured underlayment made with recaptured gypsum Minimum 3/4 thickness over the top of radiant tubes or cables Compressive strength of psi Suitable for use in radiant heat systems designed to meet the requirements of the Radiant Panel Association May be eligible for USGBC LEED Credits (MR 4.1 & 4.2) Refer to product submittal sheet IG1663 for more information Commercial/Institutional Products LEVELROCK 4500 Floor Underlayment Ideal for heavy traffic, commercial, institutional and renovation projects, as well as floor corrections over concrete substrate Compressive strength of psi Minimum 3/8 thickness over concrete, 1/4 for presanded product Can be applied at variable thickness up to 3 Refer to product submittal sheet IG1449 for more information LEVELROCK Commercial RH Floor Underlayment Specifically designed for use with radiant heat systems Compressive strength of psi Minimum 3/4 thickness over the top of radiant tubes or cables Suitable for use in radiant heat systems designed to meet the requirements of the Radiant Panel Association Meets resilient commercial floor covering industry standards Refer to product submittal sheet IG1541 for more information LEVELROCK PROFLOW Floor Underlayment Self-leveling, premium underlayment or topping designed for use in residential, commercial, institutional and rehab construction Compressive strength of psi Provides a smooth, hard underlayment surface over concrete or other LEVELROCK floor underlayments May be decorated or coated with an approved coating system to provide a finished floor Minimum 1/4 thickness over concrete and over 3/4 of 3500 underlayment over wood Refer to product submittal sheet IG1504 for more information 8 USG Poured Cementitious Floor Systems

9 LEVELROCK CSD Floor Underlayment Compressive strength of psi Minimum 1 thickness over top of flute (or highest point on corrugated steel deck) Specifically designed for use as a non-structural underlayment in corrugated steel deck systems Up to 55% lighter than 3 of concrete with 120 lb. density Refer to product submittal sheet IG1648 for more information LEVELROCK SLC TM 200 Floor Underlayment Premium self-leveling Portland-based cement Installs from feather edge to 2 May be decorated, stained or coated with an approved coating system to provide a finished floor Refer to product submittal sheet IG1642 for more information LEVELROCK SLC TM 300 Floor Underlayment Premium self-drying and -leveling engineered cement Installs from feather edge to 1-1/4 Install final floor covering in 24 hours May be decorated, stained or coated with an approved coating system to provide a finished floor Refer to product submittal sheet IG1645 for more information LEVELROCK SLC TM 400 Floor Underlayment Premium self-leveling engineered cement Installs from feather edge to 5/8 High traffic, wear-resistant surface suitable for warehouse and industrial applications No floor covering or coating required Refer to product submittal sheet IG1646 for more information Related Products LEVELROCK SRB Sound Board Economical sound control material used in systems to meet or exceed new minimum IBC code criteria of 50 IIC and 50 STC 3/8 thick board made of mineral fibers Lightweight, cuts easily with a utility knife Refer to product submittal sheet IG1523 for more information LEVELROCK SRM-25 Sound Mat High-performance sound control material used in thinner profile systems to meet or exceed new minimum IBC code criteria of 50 IIC and 50 STC 1/4 thick mat made of polypropylene with polyethylene cones Refer to product submittal sheet IG1619 for more information 9 USG Poured Cementitious Floor Systems

10 Components LEVELROCK Perimeter Isolation Strip Required to create an acoustical break between underlayment and walls Isolates floors from walls and columns to minimize cracking due to building movement and vibration Light and flexible LEVELROCK Floor Primer Seals and improves adhesion of LEVELROCK floor underlayment to wood subfloors Can be used between multiple pours of LEVELROCK floor underlayment to enhance bonding Refer to product submittal sheet IG1505 for more information LEVELROCK Concrete Primer Applied as a sealer over concrete subfloors prior to the installation of LEVELROCK floor underlayment Seals porous concrete surfaces Used over 4500 floor underlayment to enhance bond to finished floor adhesive Refer to product submittal sheet IG1574 for more information LEVELROCK SE-100 Surface Enhancer Designed to enhance bond between underlayment and floor covering Unique identifier (visible only under a blacklight) reduces risk of improper underlayment preparation For use on 2500, 3500, RH and commercial RH floor underlayments Refer to product submittal sheet IG1618 for more information LEVELROCK CSD Primer Improves adhesion of LEVELROCK underlayment over corrugated steel deck Pigmented to ensure uniform coverage Refer to product submittal sheet IG1648 for more information 10 USG Poured Cementitious Floor Systems

11 Performance Testing LEVELROCK floor underlayment systems have been thoroughly tested to meet performance requirements for fire resistance, sound control and durability. Performance Tests United States Gypsum Company performs LEVELROCK testing in laboratories, not as field tests. Laboratory sound tests provide a laboratory-controlled, standard environment, whereas field tests provide a measure of the acoustical environment only for the specific space tested. (Field tests are labeled FIIC and FSTC, while laboratory tests are labeled IIC and STC.) a Other product and system elements tested are durability, strength and surface drying or moisture content. LEVELROCK floor underlayment systems are compatible with floor systems which have been designed to limit deflections to L/360. Building code acceptances include: ICC Evaluation Service Report No. ER-5885 International Conference of Building Officials (ICBO) Report No. ER-5885 Building Officials and Code Administrators International, Inc. (BOCA) Research Report No Southern Building Code Congress International, Inc. (SBCCI) Evaluation Report No New York City Department of Buildings MEA (Materials and Equipment Acceptance) M. LEVELROCK CSD Floor System MEA M (1 hour) U.S. Department of Housing and Urban Development (HUD) 1314 Sand analysis is provided by United States Gypsum for LEVELROCK authorized applicators. Because 60-70% of the mix is sand, which varies tremendously from region to region, it is extremely important to test sand to prevent excess fine or coarse particles from affecting application rates and finish product performance. Testing Methods All United States Gypsum Company s products and systems undergo exhaustive testing to ensure that they meet exacting standards. Products are Classified as to fire resistance and fire-hazard properties. As part of this protocol, Underwriters Laboratories (UL) periodically audits production of these materials to ensure compliance with necessary properties. UL is an independent, not-for-profit product safety testing and certification organization that has tested products for public safety for more than a century. Products are manufactured and tested in accordance with ASTM standards. ASTM International is one of the largest voluntary standards development organizations in the world, and is a trusted source for technical standards for materials, products, systems and services. The National Institute of Standards and Technology (NIST) administers the National Voluntary Laboratory Accreditation Program (NVLAP). Test results of acoustical assemblies are verified by an independent lab. Sound testing is conducted according to ASTM E90 and ASTM E492 and verified by a NVLAP-accredited laboratory. (a) STC/IIC Disclaimer: Published STCs (Sound Transmission Class) are based on laboratory tests per ASTM E90 Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements and classed per ASTM E413 Classification for Rating Sound Insulation. Published IICs (Impact Insulation Class) are based on laboratory tests run per ASTM E492 Standard Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor- Ceiling Assemblies using the Tapping Machine and classed per ASTM E89 Standard Classification for Determination of Impact Insulation Class (IIC). The STC and IIC are tests of the partitions and/or floor-ceiling assemblies installed in the test opening of an idealized test facility with highly reverberant and diffuse sound fields in the test rooms and where the only significant path for the transfer of sound energy is through the assembly under test. Actual performance under field conditions may differ significantly based upon the installation quality, existence of flanking paths, leakage paths in the assembly, existing room conditions and expertise of the testing agency. These test methods are not intended for field tests, but if necessary, field test should be performed per ASTM E336 or E1007 (FSTC (ASTC) and FIIC). The field test standards allow for greater variations in the room and test conditions and in procedures, which can affect the final result and make comparison between field tests difficult. It is generally considered acceptable for field test results to be up to 5 points less than laboratory results. The above limitations notwithstanding, these methods have been used successfully for a number of years to rank order assemblies, and the test results are commonly used for this purpose. 11 USG Poured Cementitious Floor Systems

12 Performance Testing Sustainability The LEED (Leadership in Energy and Environmental Design) program is a guideline for building solutions established by the U.S. Green Building Council (USGBC). The LEED program s mission is to transform the building industry by establishing a common standard of measurement to define what constitutes a green building. To this end, The LEED program provides a framework for assessing building performance and meeting sustainability goals. This framework assigns points for certain sustainability criteria, such as sustainable site development, water savings, energy efficiency, materials selection and indoor environmental quality. Specific products cannot be LEED-certified because there are many contingent factors on each project that must be considered. However, LEVELROCK green floor underlayment products may be eligible for LEED Credits MR 4.1 and 4.2. USGBC LEED Credits Construction Waste MR 2 Management 2.1 Divert 50% of project waste (by weight) from landfill (1 point) 2.2 Divert another 25% of project waste (by weight) from landfill (1 point) Recycled Content MR If 25% of project materials by weight have 20% post-consumer or 40% post-industrial (1 point) 4.2 Another 25% of project materials (1 point) Local/Regional Materials MR If 20% of project materials are manufactured within 500 miles (1 point) 5.2 If raw materials for above products are obtained within 500 miles of manufacturing (1 point) Low-Emitting Materials EQ Drywall installation less than 200g/L per Green Seal, Table 5 (1 point) 12 USG Poured Cementitious Floor Systems

13 Testing Results Fire Protection UL Classifications appear on LEVELROCK floor underlayment packaging. To ensure that installed systems fire ratings are not compromised, only use products that are marked as UL Classified or are approved by United States Gypsum Company. Sound Control Sound control data verified by a NVLAP-accredited third-party demonstrates the effectiveness of LEVELROCK floor underlayment systems in attenuating sound. LEVELROCK floor underlayment systems limit airborne and impact (STC and IIC) noise between stacked units. This improves the value per square foot for developers and owners, as occupants are less likely to be disturbed by impact or transmitted noise from adjacent units. LEVELROCK sound systems are designed to meet or exceed the International Building Code s (IBC) minimum requirement of 50 IIC and 50 STC. The addition of the SRM-25 sound mat or the SRB sound board can increase IIC up to 25 points. Moisture/Mold The best way to minimize damage from mold is to minimize or eliminate exposure to water before, during and after construction. LEVELROCK floor underlayment has a very low water demand and chemically sets in 2-3 hours. Faster drying time on the job site due to improved air circulation and reduced contact of the wet underlayment with a watersensitive substrate help minimize the potential for mold and mildew. 13 USG Poured Cementitious Floor Systems

14 Performance Selector Steel Framed 1 Hour Fire-rated Construction Steel C-Joist Framing Acoustical Performance Reference Construction Detail Description Test Number STC IIC Test Number ARL Index clg. wt. 4 15/32 wood subfloor UL Des L524 SA " 7 18 gauge steel joist, 24 o.c. 2 layers 1/2 SHEETROCK FIRECODE C Core 3/4 LEVELROCK floor underlayment optional SRM-25 sound mat or SRB sound board USG DGL drywall suspension system " 5/8 SHEETROCK FIRECODE C Core UL Des L564 SA /4 structural cement fiber units 9-1/4 16 gauge steel joist, 24 o.c. RC-1 spaced 12 o.c. 3-5/8" minimum insulation optional 3/4 LEVELROCK floor underlayment optional SRM-25 sound mat only " 1-9/16 LEVELROCK floor underlayment UL Des G551 SA /8 SHEETROCK FIRECODE Core 9-1/4 16 gauge TRADEREADY steel joist, 24 o.c. corrugated steel deck minimum 22 gauge RC-1 spaced 12 o.c. 3-5/8 minimum insulation optional SRM-25 sound mat only optional USG DGL drywall suspension system 1-9/16 LEVELROCK Floor Underlayment UL Des G551 w/ RAL-OT & SA /8 SHEETROCK FIRECODE Core Gypsum Panel suspended RAL-OT /4 16 gauge TRADEREADY steel joist, 24 o.c. ceiling 1 LEVELROCK underlayment, vinyl, corrugated steel deck minimum 22 gauge RC-1 spaced 12 o.c. 3-1/2 minimum insulation SRM-25 sound mat, 3-1/2 insulation optional SRM-25 sound mat only USG DGL drywall suspension system RAL-OT & RAL-OT LEVELROCK underlayment, carpet and pad, SRM-25 sound mat, 3-1/2 insulation RAL-OT & RAL-OT LEVELROCK underlayment, engineered wood laminate, SRM-25 sound mat, 3-1/2 insulation RAL-OT & RAL-OT LEVELROCK underlayment, ceramic tile, SRM-25 sound mat, 3-1/2 insulation 2 Hour Fire-rated Construction " 1-9/16 LEVELROCK floor underlayment UL Des G551 SA layers 5/8 SHEETROCK FIRECODE Core 9-1/4 16 gauge TRADEREADY steel joist, 24 o.c. corrugated steel deck minimum 22 gauge RC-1 spaced 12 o.c. 3-5/8 minimum insulation optional SRM-25 sound mat only optional USG DGL drywall suspension system 14 USG Poured Cementitious Floor Systems

15 Steel Framed 2 Hour Fire-rated Construction Steel Bar Joist Framing Acoustical Performance Reference Construction Detail Description Test Number STC Test Number ARL Index " 1/2 LEVELROCK floor underlayment UL Des G230 SC type 10J2 steel joist spaced maximum 4 o.c. SA305 5/8 or 3/4 FR-83, 3/4, 3/4 FR-X1 or 3/4 Astro-FR DXL, DXLA, DXLZ, DXLZA, SDXL, SDXLA or ZXLA susp exp grid system 2 T&G building units steel bar joists, 4 o.c. W8x31 beam " 1/2 LEVELROCK floor underlayment UL Des G516 SA deep T&G building units W8x20 steel beam steel bar joists, 4 o.c 5/8 SHEETROCK FIRECODE C Core 15 USG Poured Cementitious Floor Systems

16 Performance Selector Wood Framed 1 Hour Fire-rated Construction Dimensional Lumber Acoustical Performance Reference Construction Detail Description Test Number STC IIC Test Number ARL Index clg. wt. 3 1/2 or 5/8 SHEETROCK FIRECODE C Core UL Des L512 SA305 8, ceiling SA920 1 nominal wood sub and finished floor 2x10 wood joist 16 o.c. joints finished optional 3/4 LEVELROCK floor underlayment optional SRM-25 sound mat or SRB sound board optional veneer plaster clg. wt. 3 1/2 or 5/8 SHEETROCK FIRECODE C Core UL Des L525 SC2000 9, ceiling SA305 1 nominal wood sub and finished floor 2x10 wood joist 16 o.c. USG DGL drywall suspension system joints finished optional 3/4 LEVELROCK floor underlayment in lieu of second layer of plywood optional SRM-25 sound mat or SRB sound board 3/4 LEVELROCK floor underlayment UL Des L206 SC /8 FR-83 or 3/4 FR-X1 lay-in acoustical SA305 panels DXL, DXLA, DXLZ, DXLZA, SDXL or SDXLA susp exp grid system or 1/2 FC-CB 19/32 T&G wood subfloor 2x10 wood joist 16 o.c. clg. wt. 3 3/4 LEVELROCK floor underlayment UL Des L501 SA /8 SHEETROCK FIRECODE Core joints finished damper optional 19/32 T&G wood subfloor 2x10 wood joist 16 o.c " optional SRM-25 sound mat or SRB sound board clg. wt. 3 1/2 SHEETROCK FIRECODE C Core UL Des L502, SA x10 wood joist 16 o.c. L514 RC-1 or equivalent space 24 o.c. 19/32 T&G wood subfloor perpendicular optional SRM-25 sound mat or SRB sound board 3/4 LEVELROCK floor underlayment " insulation optional 16 USG Poured Cementitious Floor Systems

17 Wood Framed 1 Hour Fire-rated Construction Dimensional Lumber Acoustical Performance Reference Construction Detail Description Test Number Comments STC IIC Test Number Folder ARL Index wt. 6, wt. 5 3/4 LEVELROCK floor underlayment UL Des L RAL-TL & SA /32 wood structural panel perpendicular RAL-IN x10 wood joist 16 o.c. 1 LEVELROCK, vinyl, SRM-25 sound RC-1 channel or equivalent mat, 3-1/2 insulation Insulation optional-check UL Directory for proper 12" placement over gypsum ceiling or under RAL-TL & plywood subflooring RAL-IN /8 SHEETROCK FIRECODE C Core s 1 LEVELROCK, cushion vinyl, SRM- optional SRB sound board or SRM-25 sound mat 25 sound mat, 3-1/2 insulation USG DGL drywall suspension system RAL-TL & RAL-IN LEVELROCK, carpet and pad, SRM- 25 sound mat, 3-1/2 insulation RAL-TL & RAL-IN LEVELROCK underlayment, engineered wood laminate, SRM- 25 sound mat, 3-1/2 insulation RAL-TL & RAL-IN LEVELROCK, ceramic tile, SRM-25 sound mat, 3-1/2 insulation RAL-TL & RAL-IN /4 LEVELROCK, cushion vinyl, SRB sound board, 3-1/2 insulation RAL-TL & RAL-IN /4 LEVELROCK, carpet and pad, SRB sound board, 3-1/2 insulation RAL-TL & RAL-IN /4 LEVELROCK underlayment, engineered wood laminate, SRB sound board, 3-1/2 insulation 2 Hour Fire-rated Construction 13" 1-1/2 LEVELROCK floor underlayment UL Des L541 SA layers 5/8 SHEETROCK FIRECODE C Core optional SRM-25 sound mat or SRB sound board 15/32 wood subfloor 2x10 wood joist spaced 16 o.c. 3 THERMAFIBER SAFB RC-1 channel or equivalent " 2 layers 5/8 SHEETROCK FIRECODE C Core UL Des L511 SA /32 T&G wood subfloor 2x10 wood joist 16 o.c. RC-1 or equivalent spaced 24 o.c. joints finished optional 3/4 minimum LEVELROCK floor underlayment optional SRM-25 sound mat or SRB sound board 17 USG Poured Cementitious Floor Systems

18 Performance Selector Wood Framed 1 Hour Fire-rated Construction Engineered Joist Acoustical Performance Reference Construction Detail Description Test Number STC IIC Test Number ARL Index clg. wt. 3 5/8 SHEETROCK FIRECODE C Core UL Des L530 SA /4 LEVELROCK floor underlayment 3/4 plywood perpendicular 9-1/2 I wood joist spaced maximum 24 o.c. metal furring channel 24 o.c. 1-1/4 THERMAFIBER insulation laid over channel " below joist joints finished " " 2 layers 1/2 SHEETROCK FIRECODE C Core gypsum UL Des L RAL-OT-O3-05/06 SA panel optional SRM-25 sound mat or SRB sound board 19/32 wood subfloor 9-1/2 deep I shaped wood joist 24 o.c. RC-1 or equivalent spaced 16" o.c. 3/4 minimum LEVELROCK floor underlayment LEVELROCK underlayment, vinyl, SRM-25 sound mat, 3-1/2 insulation RAL-OT-O3-07/08 1 LEVELROCK underlayment, engineered wood laminate, SRM-25 sound mat, 3-1/2 insulation RAL-OT-O3-09/10 1 LEVELROCK underlayment, ceramic tile, SRM-25 sound mat, 3-1/2 insulation RAL-OT-O3-01/02 3/4 LEVELROCK underlayment, vinyl, SRB sound board, 3-1/2 insulation RAL-OT-O3-03/04 3/4 LEVELROCK underlayment, ceramic tile, SRB sound board, 3-1/2 insulation RAL-OT-O2-03/04 3/4 LEVELROCK underlayment, engineered wood laminate, SRB sound board, 3-1/2 insulation 2 Hour Fire-rated Construction " 3 layers SHEETROCK FIRECODE C Core UL Des L538 SA /8 thick wood structural panels 9-1/2 deep I shaped wood joist spaced 19.2 o.c. RC-1 channel or equivalent spaced 16 o.c. optional 3/4 LEVELROCK floor underlayment optional SRB sound board or SRM-25 sound mat 18 USG Poured Cementitious Floor Systems

19 Wood Framed 1 Hour Fire-rated Construction Truss Acoustical Performance Reference Construction Detail Description Test Number STC IIC Test Number ARL Index clg. wt. 3 5/8 SHEETROCK FIRECODE C Core UL Des L521, RAL-0T & 02 SA minimum 12 deep parallel chord wood truss, L550, L563 1 LEVELROCK underlayment, vinyl, 24 o.c. 3/4 plywood floor SRM-25 sound mat, 3-1/2 insulation, 12 joist RC-1 channels or equivalent spaced 16 o.c " joints finished RAL-0T & 04 optional ceiling damper 1 LEVELROCK underlayment, optional 3/4 minimum LEVELROCK floor cushion vinyl, SRM-25 sound mat, underlayment 3-1/2 insulation, 12 joist USG DGL drywall suspension system RAL-0T & 06 insulation optional check UL Directory for 1 LEVELROCK underlayment, carpet RC-1 spacing and proper placement over gypsum and pad, SRM-25 sound mat, ceiling or under plywood subflooring 3-1/2 insulation 12 joist RAL-0T & 08 1 LEVELROCK, engineered wood laminate, SRM-25 sound mat, 3-1/2 insulation, 12 joist RAL-0T & 12 1 LEVELROCK underlayment, ceramic tile, SRM-25 sound mat, 3-1/2 insulation, 12 joist RAL-TL & IN /4 LEVELROCK underlayment, vinyl, 3-1/2 insulation, 18 joist 76 RAL-IN /4" LEVELROCK underlayment, carpet and pad, 18 joist " 5/8 SHEETROCK FIRECODE C Core gypsum UL Des L RAL-TL & SA panel RAL-IN /32 T&G wood subfloor 3/4 LEVELROCK underlayment, parallel chord wood truss 24 o.c. carpet and pad, RC-1 spaced RC-1 or equivalent spaced 16 o.c. 16 o.c., 24 oz. carpet, 12 joist 3/4 LEVELROCK floor underlayment clg. wt. 3 5/8 SHEETROCK FIRECODE C Core gypsum UL Des L555 SA panel 23/32 T&G wood subfloor 11-7/8 parallel chord wood truss 24 o.c. RC-1 or equivalent space maximum " 3-1/2 glass fiber insulation 3/4 LEVELROCK floor underlayment 2 Hour Fire-rated Construction " 3/4 LEVELROCK floor underlayment UL Des L577 SA /8 SHEETROCK FIRECODE C Core parallel chord wood truss min. 12 depth, 24 o.c. 23/32 T&G wood subfloor RC-1 channels or equivalent joints finished optional SRM-25 sound mat or SRB sound board insulation optional check UL directory for proper placement over gypsum ceiling or under plywood subflooring 19 USG Poured Cementitious Floor Systems

20 Performance Selector Precast Concrete Units (Unrestrained) 2 Hour Fire-rated Construction Non-Load Bearing Acoustical Performance Reference Construction Detail Description Test Number STC Test Number ARL Index 8 1 2" 1/2 LEVELROCK floor underlayment UL Des J991, SA optional SRM-25 sound mat or SRB sound board J994 8 minimum thick normal weight precast concrete units 3/4 LEVELROCK floor underlayment UL Des J927 SA , 8, 10 or 12 thick precast concrete units optional SRM-25 sound mat or SRB sound board floor topping thickness should be a minimum of 1 if using SRM-25 sound mat, 3/4 for SRB sound board 3/4 LEVELROCK floor underlayment UL Des K906 SA ,8,10 or 12 thick precast concrete units optional SRM-25 sound mat or SRB sound board floor topping thickness should be a minimum of 1 if using SRM-25 sound mat, 3/4 for SRB sound board 3 Hour Fire-rated Construction 1/2 LEVELROCK floor underlayment UL Des J924 SA thick precast concrete units optional SRM-25 sound mat or SRB sound board floor topping thickness should be a minimum of 1 if using SRM-25 sound mat, 3/4 for SRB sound board 20 USG Poured Cementitious Floor Systems

21 Precast Concrete Units (Restrained) 3 Hour Fire-rated Construction Non-Load Bearing Acoustical Performance Reference Construction Detail Description Test Number STC Test Number ARL Index 1/2 LEVELROCK floor underlayment UL Des J931, J957 SA ,10 or 12 thick precast concrete units optional SRM-25 sound mat or SRB sound board floor topping thickness should be a minimum of 1 if using SRM-25 sound mat, 3/4 for SRB sound board 3/4 LEVELROCK floor underlayment UL Des J966 SA thick precast concrete units optional SRM-25 sound mat or SRB sound board floor topping thickness should be a minimum of 1 if using SRM-25 sound mat, 3/4 for SRB sound board 3/4 LEVELROCK floor underlayment UL Des J919, J920 SA precast concrete units optional SRM-25 sound mat or SRB sound board floor topping tickness should be a minimum of 1 if using SRM-25 sound mat, 3/4 for SRB sound board 8 1 2" 1 LEVELROCK floor underlayment UL Des J991, J994 SA optional SRM-25 sound mat or SRB sound board 8 minimum thick normal weight precast concrete units 21 USG Poured Cementitious Floor Systems

22 Flooring Details Installed Before Drywall No Framing Open Floor non-loadbearing partition non-loadbearing partition 1 /2" or 5 /8" SHEETROCK 1 /2" or 5 /8" SHEETROCK SHEETROCK acoustical sealant SHEETROCK acoustical sealant 1 /4" gap steel runner 3 /4" min. LEVELROCK floor underlayment wood subfloor 1 /4" gap steel runner LEVELROCK floor underlayment a concrete subfloor (a) Refer to product information for minimum thickness. Without Sound Barrier wood or steel stud 1 /2" or 5 /8" SHEETROCK SHEETROCK acoustical sealant 3 /4" min. LEVELROCK floor underlayment steel stud steel runner (non-standard item) 1 /2" or 5 /8" SHEETROCK 1 /4" SHEETROCK acoustical sealant LEVELROCK floor underlayment a base plate wood subfloor 2" concrete subfloor (a) Refer to product information for minimum thickness. 22 USG Poured Cementitious Floor Systems

23 Installed Before Drywall Over LEVELROCK SRM-25 Sound Mat 1 /2" or 5 /8" SHEETROCK 1 /2" or 5 /8" SHEETROCK wood stud double plate fastener 3 /8" from bottom edge of drywall 1 /4" SHEETROCK acoustical sealant LEVELROCK perimeter isolation strip 1" min. LEVELROCK floor underlayment 1 /4" SRM-25 sound mat steel stud steel runner (non-standard item) fastener 3 /8" from edge of drywall 1 /4" SHEETROCK acoustical sealant LEVELROCK perimeter isolation strip 1" min. LEVELROCK floor underlayment 1 /4" SRM-25 sound mat 1 1 /2" 3 /4" 2" 3 /4" wood subfloor concrete subfloor Over LEVELROCK SRB Sound Board 1 /2" or 5 /8" SHEETROCK 1 /2" or 5 /8" SHEETROCK fastener 3 /8" from edge of drywall fastener 3 /8" from edge of drywall 1 /4" SHEETROCK acoustical sealant LEVELROCK perimeter isolation strip LEVELROCK perimeter isolation strip SHEETROCK acoustical sealant wood stud double plate 1 1 /2" 3 /4" 3 /4" LEVELROCK floor underlayment 3 /8" SRB sound board steel stud steel runner (non-standard item) 2" 3 /4" min. LEVELROCK floor underlayment 3 /8" SRB sound board 3 /4" wood subfloor concrete subfloor 23 USG Poured Cementitious Floor Systems

24 Flooring Details Installed After Drywall Over LEVELROCK SRM-25 Sound Mat wood or steel stud 1 /2" or 5 /8" SHEETROCK LEVELROCK perimeter isolation strip 1" min. LEVELROCK floor underlayment 1 /4" SRM-25 sound mat wood or steel stud 1 /2" or 5 /8" SHEETROCK LEVELROCK perimeter isolation strip 1" min. LEVELROCK floor underlayment 1 /4" SRM-25 sound mat wood subfloor base plate base plate concrete subfloor Without Sound Barrier wood or steel stud 1 /2" or 5 /8" SHEETROCK 3 /4" min. LEVELROCK floor underlayment wood or steel stud 1 /2" or 5 /8" SHEETROCK LEVELROCK floor underlayment a base plate wood subfloor base plate concrete subfloor (a) Refer to product information for minimum thickness. 24 USG Poured Cementitious Floor Systems

25 Installed After Drywall LEVELROCK PROFLOW Over Wood Subfloor wood or steel stud 1 /2" or 5 /8" SHEETROCK LEVELROCK perimeter isolation strip 1 /4" PROFLOW floor underlayment 3 /4" min floor underlayment wood or steel stud 1 /2" or 5 /8" SHEETROCK LEVELROCK perimeter isolation strip 1 /4" PROFLOW floor underlayment 3 /4" min floor underlayment 1 /4" SRM-25 sound mat base plate base plate wood subfloor wood subfloor LEVELROCK Over EPS Foam steel stud (non-load bearing partitions) steel runner (non-standard item) 1 /2" or 5 /8" SHEETROCK fastener 3 /8" from edge of drywall 1 /4" SHEETROCK acoustical sealant 1" min. LEVELROCK floor underlayment steel stud (non-load bearing partitions) steel runner (non-standard item) 1 /2" or 5 /8" SHEETROCK fastener 3 /8" from edge of drywall 1 /4" SHEETROCK acoustical sealant 1 1 /2" min. LEVELROCK floor underlayment 2" EPS (Extruded Polystyrene Foam) a 2" EPS (Extruded Polystyrene Foam) a 1" diameter columns drilled through EPS 12" o.c. EPS adhesively attached to subfloor wood or concrete subfloor EPS adhesively attached to subfloor wood or concrete subfloor (a) EPS must meet physical properties of ASTM C for Type IV or Type IX Board (a) EPS must meet physical properties of ASTM C for Type IV or Type IX Board 25 USG Poured Cementitious Floor Systems

26 Design Details Sound Control Systems Open Web Wood Truss Floor Covering STC IIC Sound System 1 (no sound mat) UL Des L521 None 55 Sheet vinyl Carpet and pad 76 sheet vinyl 3/4 LEVELROCK floor underlayment batts/blankets held w/ insulation supports wood subfloor open web wood truss resilient channel 5/8 SHEETROCK FIRECODE C Core Note Refer to UL Directory for proper RC-1 spacing based on placement of insulation. Sound test evaluated with 18 truss spaced 24 o.c. Sound System 2 (SRM-25 sound mat) UL Des L521 ceramic tile 1 LEVELROCK floor underlayment batts/blankets held w/ insulation supports 1/4 SRM-25 sound mat wood subfloor open web wood truss resilient channel 5/8 SHEETROCK FIRECODE C Core Sheet vinyl Cushioned vinyl Carpet and pad Ceramic tile Engineered wood laminate Note Refer to UL Directory for proper RC-1 spacing based on placement of insulation. Sound test evaluated with 12 truss spaced 24 o.c. Tile requires the use of crack isolation membrane. Sound System 3 (no sound mat) UL Des L oz. carpet and pad Note Sound test evaluated with 12 truss spaced 24 o.c. carpet and pad 3/4 LEVELROCK floor underlayment wood subfloor open web wood truss resilient channel 5/8 SHEETROCK FIRECODE C Core 26 USG Poured Cementitious Floor Systems

27 Engineered Wood I-Joist Floor Covering STC IIC Sound System 4 (SRM-25 sound mat) UL Des L570 Sheet vinyl Ceramic tile Engineered wood laminate engineered wood laminate 1 LEVELROCK floor underlayment batts/blankets held w/ insulation supports Note Refer to UL Directory for proper RC-1 spacing based on placementof insulation. Sound test evaluated with 9-1/2 engineered wood i-joist spaced 24 o.c. 1/4 SRM-25 sound mat wood subfloor engineered wood I-joist resilient channel 2 layers 1/2 SHEETROCK FIRECODE C Core Sound System 5 (SRB sound board) UL Des L570 sheet vinyl 3/4 LEVELROCK floor underlayment batts/blankets held w/ insulation supports 3/8 SRB sound board wood subfloor engineered wood I-joist resilient channel 2 layers 1/2 SHEETROCK FIRECODE C Core None 65 Sheet vinyl Ceramic tile Engineered wood laminate Note Refer to UL Directory for proper RC-1 spacing based on placement of insulation. Sound test evaluated with 9-1/2 engineered wood i-joist spaced 24 o.c. 2 x 10 Wood Joist Floor Covering STC IIC Sound System 6 (SRM-25 sound mat) UL Des L569 sheet vinyl 1 LEVELROCK floor underlayment batts/blankets held w/ insulation supports 1/4 SRM-25 sound mat wood subfloor 2 x 10 wood joist resilient channels 5/8 SHEETROCK FIRECODE C Core Sheet vinyl Cushioned vinyl Carpet and pad Ceramic tile Engineered wood laminate Note Refer to UL Directory for proper RC-1 spacing based on placement of insulation. Sound test evaluated with 2x10 wood joist spaced 16 o.c. 27 USG Poured Cementitious Floor Systems

28 Design Details Sound Control Systems 2 x 10 Wood Joist Floor Covering STC IIC Sound System 7 (SRB sound board) UL Des L569 cushioned vinyl 3/4 LEVELROCK floor underlayment batts/blankets held w/ insulation supports 3/8 SRB sound board wood subfloor 2 x 10 wood joist resilient channels 5/8 SHEETROCK FIRECODE C Core Cushioned vinyl Carpet and pad Engineered wood laminate Note Refer to UL Directory for proper RC-1 spacing based on placement of insulation. Sound test evaluated with 2x10 wood joist spaced 16 o.c. Steel Joist Floor Covering STC IIC Sound System 8 (SRM-25 sound mat) UL Des G551 1 LEVELROCK floor underlayment batts/blankets held w/ insulation supports 1/4 SRM-25 sound mat LEVELROCK floor underlayment corrugated steel deck minimum 22 gauge gauge TRADEREADY steel joist USG drywall suspension system 5/8 SHEETROCK FIRECODE C Core Sheet vinyl Carpet and pad Ceramic tile Engineered wood laminate USG Poured Cementitious Floor Systems

29 Concrete Slab Floor Covering STC IIC Sound System 9 (no sound mat) Concrete slab None 26 6 concrete slab Sound System 10 (SRM-25 sound mat) Concrete slab and LEVELROCK Floor Underlayment sheet vinyl 1 LEVELROCK floor underlayment 1/4 SRM-25 sound mat 6 concrete slab Sheet vinyl Carpet and pad 77 Ceramic tile Engineered wood laminate LEVELROCK bare floor USG Poured Cementitious Floor Systems

30 Good Design Practices Use this section as a reference if questions arise during the design or application of LEVELROCK floor underlayment systems. This section is an overview of design, application, installation and safety considerations that should be addressed when United States Gypsum Company s products and systems are used. This section outlines some major issues, but is not intended to be a comprehensive review. United States Gypsum Company recommends that architects and contractors seek the assistance of safety professionals, especially at the construction site, because there are many factors to consider that are not included here. For more information on safety and material handling, please refer to Chapter 13 of The Gypsum Construction Handbook, Centennial Edition. 1 System Performance United States Gypsum Company conducts tests on products and systems to establish that products meet performance requirements of various jurisdictional agencies. Upon written request we will provide test certification for published fire, sound, durability and other pertinent data covering systems designed and constructed according to our published specifications. Substitutions of any components are not recommended or supported by the United States Gypsum Company. Systems covered herein have been tested and evaluated for use as described. For other system applications, consult your local representative. All details, specifications and data contained in this literature are intended as a general guide. These products must not be used in a design or construction of any structure without complete and detailed evaluation by a qualified structural engineer or architect to verify suitability of a particular product for use in the structure. Information in this publication should be used only for LEVELROCK floor underlayment, as physical properties of competitive products may vary. United States Gypsum Company assumes no liability for failure resulting from the use of alternative materials or application or installation not specified herein. 2 Floor Design Subfloor systems shall be designed for a deflection limit of L/360 for the span. The design live loads and dead loads shall be included in the deflection calculation. 3 Building Joints Carry joints through the underlayment at the same width and configuration as the building joints. 30 USG Poured Cementitious Floor Systems

31 4 Standards The following standards apply to LEVELROCK poured gypsum underlayments: 3500 psi minimum compressive strength for commercial vinyl Compressive strengths are tested in accordance with ASTM C for gypsum cement and ASTM C109 modified for engineered cement Sand analysis determining proper particle distribution tested in accordance with ASTM C Surface drying or moisture content tested in accordance with ASTM F1869 Calcium Chloride for engineered cement, ASTM D4263 for gypsum cement Robinson Floor tested in accordance with ASTM C627 for ceramic tile 5 Runner Track Gas-charged systems have performed well for fastening of runner track to LEVELROCK floor underlayment products. Attachment Powder-actuated systems are not recommended; refer to fastener manufacturer recommendations for embedment depths. 31 USG Poured Cementitious Floor Systems

32 Application Guide Specifications This guide is provided to assist you in specification of LEVELROCK Floor Underlayments. If you have additional questions or would like more information regarding this or other USG products and systems, please contact USG at 800 USG.4YOU. Part 1: General 1.1 Specify to meet project requirements. Scope 1.2 All materials, unless otherwise indicated, shall be manufactured by United States Gypsum Company and shall be Qualifications installed in accordance with its current printed directions by LEVELROCK floor underlayment authorized applicators. 1.3 All materials shall be delivered in their original unopened packages and stored in an enclosed shelter providing Delivery and Storage protection from damage and exposure from the elements. Damaged or deteriorated materials shall be removed from of Materials the premises. 1.4 Before, during and after installation of product, building interior shall be enclosed and maintained at a temperature Site Conditions above 50 F (10 C). Do not install when ambient air temperatures exceed 120 F. Part 2: Mixing 2.1 A. Gypsum Cement Products LEVELROCK 2500 floor underlayment ( psi) LEVELROCK 2500 green floor underlayment ( psi) LEVELROCK 3500 floor underlayment ( psi) LEVELROCK 3500 green floor underlayment ( psi) LEVELROCK 4500 floor underlayment ( psi) LEVELROCK RH floor underlayment ( psi) LEVELROCK RH green floor underlayment ( psi) LEVELROCK commercial RH floor underlayment ( psi) LEVELROCK commercial RH green floor underlayment ( psi) LEVELROCK PROFLOW floor underlayment ( psi) LEVELROCK CSD floor underlayment ( psi) B. Engineered Cement LEVELROCK SLC 200 floor underlayment ( days) LEVELROCK SLC 300 floor underlayment ( days) LEVELROCK SLC 400 floor underlayment ( days) C. Floor Primer Use LEVELROCK floor primer (ready mix, powdered and concentrate) over approved subfloor as specified by manufacturer. D. Concrete Primer Use LEVELROCK concrete primer over concrete substrates as specified. E. CSD Primer Use LEVELROCK CSD primer over corrugated steel deck substrate as specified by manufacturer. 32 USG Poured Cementitious Floor Systems

33 F. Sand Washed sand complying with specifications published in the LEVELROCK floor underlayment applicator s manual. Note: PROFLOW underlayment and engineered cements are presanded at the factory. Other LEVELROCK floor underlayments may be ordered presanded for jobsite convenience. G. Water Potable, free from impurities. H. Surface Enhancer Use LEVELROCK SE-100 surface enhancer over applications of LEVELROCK floor underlayment excluding 4500 floor underlayment. I. Sound Reduction Board LEVELROCK SRB sound board. J. Sound Reduction Mat LEVELROCK SRM-25 sound mat. K. Perimeter Isolation Strip LEVELROCK perimeter isolation strip. 2.2 General Note: Do not over water. Refer to submittal sheet for additional information. Mixing Proportions 2500 Floor Underlayment Gypsum Cement Add 4.5 to 5.0 gallons of water, one 80 lb. bag of 2500 floor underlayment and sand volume not to exceed 1.9 cu. ft. For POURABLE BEFORE DRYWALL process, add 4.0 to 4.5 gallons of water, one 80 lb. bag of 2500 floor underlayment and sand volume not to exceed 1.6 cu. ft Green Floor Underlayment Add 4.5 to 5.0 gallons of water, one 80 lb. bag of 2500 green floor underlayment and sand volume not to exceed 1.9 cu. ft. For POURABLE BEFORE DRYWALL process, add 4.0 to 4.5 gallons of water, one 80 lb. bag of 2500 green floor underlayment and sand volume not to exceed 1.6 cu. ft Floor Underlayment Add 4.0 to 4.5 gallons of water, one 80 lb. bag of 3500 floor underlayment and sand volume not to exceed 1.4 cu. ft Green Floor Underlayment Add 4.0 to 4.5 gallons of water, one 80 lb. bag of 3500 green floor underlayment and sand volume not to exceed 1.4 cu. ft Floor Underlayment Add 3.5 to 4.0 gallons of water, one 80 lb. bag of 4500 floor underlayment and sand volume not to exceed 1.4 cu. ft. RH Floor Underlayment Add 4.5 to 5.0 gallons of water, one 80 lb. bag of LEVELROCK RH floor underlayment and sand volume not to exceed 1.9 cu. ft. RH Green Floor Underlayment Add 4.5 to 5.0 gallons of water, one 80 lb. bag of LEVELROCK RH green floor underlayment and sand volume not to exceed 1.9 cu. ft. Commercial RH Floor Underlayment Add 4.0 to 4.5 gallons of water, one 80 lb. bag of LEVELROCK commercial RH floor underlayment and sand volume not to exceed 1.4 cu. ft. 33 USG Poured Cementitious Floor Systems

34 Application Guide Specifications Commercial RH Green Floor Underlayment Add 4.0 to 4.5 gallons of water, one 80 lb. bag of LEVELROCK commercial RH green floor underlayment and sand volume not to exceed 1.4 cu. ft. PROFLOW Floor Underlayment Use only 1.1 to 1.3 gallons of water for the 60 lb. bag. Do not over water, as it will greatly impact product performance. CSD Floor Underlayment Add 4.0 to 4.5 gallons of water, one 80 lb. bag of CSD floor underlayment and sand volume not to exceed 1.4 cu. ft. 2.3 SLC 200 Floor Underlayment Mixing Proportions Add 1.1 to 1.3 gallons of water, one 60 lb. bag of SLC 200 floor underlayment. Engineered Cement SLC 300 Floor Underlayment Add 1.1 to 1.3 gallons of water, one 55 lb. bag of SLC 300 floor underlayment. SLC 400 Floor Underlayment Add 1.1 to 1.3 gallons of water, one 55 lb. bag of SLC 400 floor underlayment. 2.4 LEVELROCK Floor Primer (Ready Mix) Mixing Proportions Apply LEVELROCK floor primer (ready mix) with a short nap paint roller, coarse fiber broom or a HUDSON sprayer. Primers and Sealers Apply material at a rate of 400 sq. ft. per gallon and do not allow puddles to form or remain on surface. Allow material to dry for 1 hour minimum prior to application of underlayments. Always use full strength. Clean tools with water before material dries. LEVELROCK Floor Primer (Powdered) Mix LEVELROCK floor primer (25 lb. powdered bag) with 14 gallons of water and apply material with a short nap paint roller, coarse broom or HUDSON sprayer. Apply at a rate of 300 square feet per gallon for a total coverage of 5,150 square feet. LEVELROCK Floor Primer (Concentrate) Before applying LEVELROCK floor primer (concentrate) to the floor, mix with equal portions of water. For example, mix 2-1/2 gallons concentrate to 2-1/2 gallons of water in a 5-gallon pail. Follow application instructions for LEVELROCK floor primer (ready mix). LEVELROCK Concrete Primer Mix by volume 1 part LEVELROCK concrete primer with 4 parts potable water in a clean mixing container. It is recommended that the LEVELROCK concrete primer be added to water. Stir gently to achieve a homogenous state. To prevent inducement of air and subsequent bubbles, do not over stir or use high-speed mixers. LEVELROCK CSD Primer Before applying LEVELROCK floor primer (concentrate) to the floor, mix with equal portions of water. For example, mix 2-1/2 gallons concentrate to 2-1/2 gallons of water in a 5-gallon pail. Follow application instructions for LEVELROCK floor primer (ready mix). 34 USG Poured Cementitious Floor Systems

35 Part 3: Execution 3.1 A. Application shall not begin until the building is enclosed, including roof, windows, doors and other apertures. Preparation B. Subfloor shall be structurally sound. Contractor shall clean subfloor to remove mud, oil, grease and other contaminating factors before arrival of the underlayment crew. Check that substrates are dry, smooth and clean. Apply leak prevention material to openings and voids. (Set temporary dams as needed.) Treat cracks with a premium latex-modified cementitious patching material. Concrete subfloors to receive SLC 200, SLC 300 and SLC 400 must be shot blasted or scarified following recommendations as outlined in the International Concrete Repair Institute Guideline No , Concrete Surface Profile 4 (CSP4). C. Wood Substrate When SLC 200 or SLC 300 floor underlayment is to be installed over wood framing, use galvanized metal lath for crack resistance. Apply LEVELROCK floor primer prior to application of LEVELROCK floor underlayment. Mix until primer is uniform. Apply primer with a short nap paint roller, coarse fiber broom or a HUDSON sprayer. Apply material at a rate of 400 sq. ft. per gallon and do not allow puddles to form or remain on surface. Allow material to dry for 45 minutes prior to application of LEVELROCK floor underlayment. Use from mixed container. Do not further dilute. Clean tools with water before material dries. D. Concrete Substrate Apply LEVELROCK concrete primer prior to application of LEVELROCK floor underlayment. As a primer for porous concrete broom or spray, apply a coat of materials made by blending 1 part concrete primer to 4 parts water and apply at a rate of 300 sq. ft. per gallon. The second coat consists of concrete primer diluted 1 to 1 with water and applied at a rate of 300 sq. ft. per gallon. For extremely porous floors, an additional coat of concrete primer diluted 1 to 1 may be needed. E. LEVELROCK Perimeter Isolation Strip When sound system is required, Apply LEVELROCK perimeter isolation strip against the wall by stapling using spray adhesive or taping to the wall. Note: Excess material, depending on floor thickness, will be cut flush and staples removed. 3.2 During the entire installation process, the building must be enclosed and the subfloor protected from rain and snow. Application of Sound The subfloor must be clean, dry and free of debris. SRB sound board or SRM-25 sound mat must be clean, dry and Boards and Mats free of debris. SRB sound board or SRM-25 sound mat are applied to the subfloor with edges tightly fit. Cut board or mat with a utility knife to fit tightly against LEVELROCK perimeter isolation strip. Offset joints 8-12 (203 mm-305 mm) from the subfloor joints. Joints and LEVELROCK perimeter isolation strip should be taped to prevent leakage. Apply LEVELROCK floor primer to the entire surface to provide maximum bond between the SRB sound board or SRM-25 sound mat and the LEVELROCK floor underlayment. For SRB sound board only, stagger the joints a minimum of 16 o.c. so that four panel corners never meet. Refer to submittal sheet IG1619 for more information on SRM-25 sound mat installation. 3.3 A. Place cementitious flooring 3/4 minimum thickness over wood subfloor; 1/4 minimum thickness over concrete Application of subfloor depending on product being used. Apply 1 over SRM-25 sound mat, and 3/4 over SRB sound board. Gypsum Cement Immediately spread and screed product to a smooth surface. Except at building joints, place product as continuously Flooring as possible until application is complete, so that no slurry is placed against product that has obtained its initial set. B. General contractor shall provide continuous ventilation and adequate heat to remove moisture from the area until the underlayment is dry. Rate of moisture removal is 0.5 lbs./sq.ft./day. 35 USG Poured Cementitious Floor Systems

36 Application Guide Specifications 3.4 A. Place desired thickness from feather edge minimum up to 2 over properly prepared subfloor. Immediately spread Application of and screed product to a smooth surface without overworking the material. Except at building joints, place product as Engineered Cement continuously as possible until application is complete, so that no slurry is placed against product that has obtained Flooring its initial set. B. General contractor shall provide continuous ventilation and adequate heat to remove moisture from the area until the underlayment is dry. Rate of moisture removal is 0.5 lbs./sq.ft./day. 3.5 A. Subfloor shall be structurally sound. Subfloor shall be clean and free of mud, oil, grease and other contaminating Alternate: factors before underlayment installation. Substrates shall be dry, smoothed and clean. All cracks and voids shall be filled Application of Flooring to reduce leaking of wet underlayment material before drying (use of temporary dams is acceptable). Prior to Drywall Installation B. Combine water, 2500 floor underlayment and sand, volume not to exceed 1.6 cu. ft. Do not over water. Water amount will change with wetness of sand floor underlayment may also be used for this application applied under manufacturer s standard mixing proportions. C. At substrate expansion, isolation and other moving joints, allow joint of same width to continue through underlayment. D. For heavy and prolonged trade traffic, areas should be protected with plywood. 3.6 After the underlayment has set, apply SE-100 surface enhancer to the gypsum cementitious underlayment. For Preparation for 4500 floor underlayment, apply LEVELROCK concrete primer as a sealer. Where floor goods manufacturers require Installation of Gluespecial adhesive or installation systems, the requirements of the manufacturer supersede these ecommendations. Down Floor Goods Damaged underlayment areas need to be repaired prior to the application of the surface enhancer to the underlayment. All LEVELROCK floor underlayment must be dry prior to sealing. Determine dryness by manufacturer s recommendations. 3.7 A. Gypsum cementitious underlayment mix shall be tested for slump as it is being pumped using a 2 (i.d.) x 4 cylinder Field Quality Control resulting in a patty size of 8-1/2 to 9-1/2 diameter. B. Engineered cementitious underlayment mix due to its flowability shall be tested for a slump as it is being pumped using a 2 (i.d.) x 1 cylinder resulting in a patty size of 5-1/2 to 6 diameter. C. Samples should be tested according to manufacturer s requirements for compressive strength and durability. 36 USG Poured Cementitious Floor Systems

37 About the cover: Project IN-N-OUT Burger Restaurant Los Angeles, CA Recipient of the 2002 AIA Honor Award Architects Kanner Architects Los Angeles, CA Photographer Mark Lohman

38 Technical Service 800 USG.4YOU Web Site Samples/Literature Samples/Literature Samples/Literature Fax Customer Service Metric Specifications USG Corporation, through its operating subsidiaries, will provide metric conversions on its products and systems to help specifiers match metric design sizes. In addition, some products are available in metric dimensions from selected manufacturing plants. Refer to SA100, Fire-Resistant Assemblies, for additional information and a Table of Metric Equivalents. Trademarks The following trademarks used herein are owned by United States Gypsum or a related company: 2500, 3500, 4500, DX, DXLA, FIRECODE, IMPERIAL,LEVELROCK,POURABLE BEFORE DRYWALL, PROFLOW, SE-100, SHEETROCK, SRB, SRM-25, USG. THERMAFIBER is a trademark of THERMAFIBER LLC. HUDSON is a trademark of H.D. Hudson Manufacturing Company. TRADEREADY is a registered trademark of Dietrich Industries, Inc. Notice We shall not be liable for incidental and consequential damages, directly or indirectly sustained, nor for any loss caused by application of these goods not in accordance with current printed instructions or for other than the intended use. Our liability is expressly limited to replacement of defective goods. Any claim shall be deemed waived unless made in writing to us within thirty (30) days from date it was or reasonably should have been discovered. Note All products described here may not be available in all geographic markets. Consult your local sales office or representative for information. Safety First! Follow good safety and industrial hygiene practices during handling and installation of all products and systems. Take necessary precautions and wear the appropriate personal protective equipment as needed. Read material safety data sheets and related literature on products before specification and/or installation. Manufactured by United States Gypsum Company 125 South Franklin Street Chicago, IL SA305/rev , United States Gypsum Company Printed in U.S.A.